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/*
* Copyright 2020, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "javacard.strongbox-service"
#include <aidl/android/hardware/security/keymint/SecurityLevel.h>
#include <android-base/logging.h>
#include <android-base/properties.h>
#include <android/binder_manager.h>
#include <android/binder_process.h>
#include "JavacardKeyMintDevice.h"
#include "JavacardRemotelyProvisionedComponentDevice.h"
#include "JavacardSecureElement.h"
#include "JavacardSharedSecret.h"
#include "OmapiTransport.h"
#include "SocketTransport.h"
#include "keymint_utils.h"
using aidl::android::hardware::security::keymint::JavacardKeyMintDevice;
using aidl::android::hardware::security::keymint::JavacardRemotelyProvisionedComponentDevice;
using aidl::android::hardware::security::keymint::SecurityLevel;
using aidl::android::hardware::security::sharedsecret::JavacardSharedSecret;
using keymint::javacard::getOsPatchlevel;
using keymint::javacard::getOsVersion;
using keymint::javacard::getVendorPatchlevel;
using keymint::javacard::ITransport;
using keymint::javacard::JavacardSecureElement;
using keymint::javacard::OmapiTransport;
using keymint::javacard::SocketTransport;
#define PROP_BUILD_QEMU "ro.kernel.qemu"
#define PROP_BUILD_FINGERPRINT "ro.build.fingerprint"
// Cuttlefish build fingerprint substring.
#define CUTTLEFISH_FINGERPRINT_SS "aosp_cf_"
template <typename T, class... Args> std::shared_ptr<T> addService(Args&&... args) {
std::shared_ptr<T> ser = ndk::SharedRefBase::make<T>(std::forward<Args>(args)...);
auto instanceName = std::string(T::descriptor) + "/strongbox";
LOG(INFO) << "adding javacard strongbox service instance: " << instanceName;
binder_status_t status =
AServiceManager_addService(ser->asBinder().get(), instanceName.c_str());
CHECK(status == STATUS_OK);
return ser;
}
std::shared_ptr<ITransport> getTransportInstance() {
bool isEmulator = false;
// Check if the current build is for emulator or device.
isEmulator = android::base::GetBoolProperty(PROP_BUILD_QEMU, false);
if (!isEmulator) {
std::string fingerprint = android::base::GetProperty(PROP_BUILD_FINGERPRINT, "");
if (!fingerprint.empty()) {
if (fingerprint.find(CUTTLEFISH_FINGERPRINT_SS, 0) != std::string::npos) {
isEmulator = true;
}
}
}
if (!isEmulator) {
return std::make_shared<OmapiTransport>();
} else {
return std::make_shared<SocketTransport>();
}
}
int main() {
ABinderProcess_setThreadPoolMaxThreadCount(0);
// Javacard Secure Element
std::shared_ptr<JavacardSecureElement> card = std::make_shared<JavacardSecureElement>(
getTransportInstance(), getOsVersion(), getOsPatchlevel(), getVendorPatchlevel());
// Add Keymint Service
addService<JavacardKeyMintDevice>(card);
// Add Shared Secret Service
addService<JavacardSharedSecret>(card);
// Add Remotely Provisioned Component Service
addService<JavacardRemotelyProvisionedComponentDevice>(card);
ABinderProcess_joinThreadPool();
return EXIT_FAILURE; // should not reach
}
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